Stutter may affect one in 10

A study of 1600 children from the Murdoch Childrens Research Institute and the University of Melbourne found it affected 11% of children by the age of four.

However, it refutes a previous suggestion that developmental stuttering is linked with a range of poorer outcomes at preschool age.

The study found stuttering kids were similar in temperament and social-emotional development but had better verbal and non-verbal skills than their peers.

Researchers were surprised to find recovery was low at 6.3% 12 months after onset,